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(No Model.)y F.v H. CRAFTS.

PRESSURE PLATE FOR PLANING MACHINES.

No. 395,487. Patented Jam. 1, 1889.

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lIniTnn STATES f FRANCIS Il'. CRAFTS, OF BUFFALO, NEV YORK, ASSIGNOR TO E. & B. HOLMES, OF SAME PLAGE.

PRESSURE-PLATE FOR PLANINCwh/ACHINES.

SPECIFICATION forming part of Letters Patent No. 395,487, dated January 1, 1889. Application filed April 5, 1888. Serial No. 269,699. (No model.)

.T0 @ZZ whom it may concern:

Be it known that I, FRANCIS Il. CRAFTS, a citizen of the United i lates, residing in Buffalo, in the county of Erie and State ot' New York, have invented certain new and useful Improvements in Pressure-Plates for Planing-hllachines, oli' which the following "is a specification.

Mci/"invention relates to the pressuIke-plate of a planing-machine, and will be fully and clearly hereinafter described an d claimed, reference being had to the accompanying drawings, in which- Figure il represents a side elevation of the pressure-plate and the usual means for raising it up or down, a` portion being broken away to expose one ol the adjusting screwsha'ts and its connecting parts. Fig. 2 is a top plan view of the pressure-plate, showing the shape and position of the diagonal ribs ,y

on the under side by dotted lines. Fig. is

4f is an end elevation of the same.

In planing-macllines heretofore made the pressure-plates are usually provided wit h ribs on the under side running across the plate in the direction ot the movement et' the lumber. The objection to this construction when considerable pressure is used is that the ribs are ver7 liable to make ilujlentations or creases in the lumber, which is very annoyingl to the operator.

The object of in v invention is lo avoid this objection by placing on the under side or face of the pressure-plate l a series of diagonal ribs, 2, having on their 'front ends the pointed ends 3, the objectof which is to more ell'ect nail)1 cause the shavings, chips, or other matter that gathers during the operation ol planing to pass each side of the ribs, which sweep everything off the lumber as it passes along under the pressure-plate- This pressure-plate is connected with a planing-machine crosshead, 4, (see Fig. 1,) in the usual way, by means ot' slideways at each end, in which the end pieces, 5, of the pressure-plate are fitted to slide up or down. A vertical screw-shaft, U, passes into the holes 7 at each end of the pressure-plate, and are each connected by bevel-gearing5x 9 with a horizontal shaft, l0, provided with a hand-wheel, Ill, by which the pressure-plate lis adjusted up or down. This mechanism i'or adjusting the pressure-plate is the old and well-known means used for such purposes. The top of the press'ureplate is provided with the usual strengthening-rib,m l2. (Shown in Fig. l.) It will be noticed that the diagonal ribs 2 are set so that the ends lili and ll cross a line, u` l), 'for instance, drawn across the face of the pressureplate. Consequently the lumber which passes under it is entirely covered b v the ribs 2, so that the an under side view of the pressure-plate. Fig.

lumber is fully covered, while there is ample room, l5, between the ribs Afor the chips or other matter to pass through. The pointed ends 3 may be dispensed with, if desired; but for many purposes they are of advantage.

I claim as my inventionl. In a wood-planing machine, a vertically adjustable pressure-plate having a series of diagonal ribs, 2, and ol'ienings 15 between them on its under face, as and for the purposes specified.

2. An adjustable pressure-plate tor woodplaning machines provided with a series of diagonal ribs, 2, having pointed ends 3 and open diagonal spaces l5 between them, substantiallr as and for the purposes described.

FRANCIS H. CRAFTS. Witn e sses:

JAMES SANesTER, CHARLES SANGSTER. 

